Trimming device



R. McCLENATHEN.

TRIMMING DEVICE.

APPLICATION. FILED MAR. 18, 192!- Patented Feb. 28, 1922.

2 SHEETSSHEET l.

an m

R. McCLENATHEN.

TRIMMING DEVICE.

Patented Feb. 28, 1922.

2 SHEETSSHEET2.

.APPLICATION FILED MAR. 18. 192i.

a M w W UNITED STATES PATENT nonnn'r mccnnn'nmnnn, or cnYAHoGA FALLS, OHIO, ,ASSIGNOR. T0 KELL -simme- FIELD Tran GOMIANY, or AxRoN, 011m, A ooaroaarron or NEW JERSEY. f

rmmmme DE ICE.

Specification of Letters Patent. Pat t d F b 28 1922 Application filed. March 18, 1921. Serial No. 453,440.

To all whom it may concern."

"B i know th R ER MQ L A- TEEN, a citizen ofthe States, residg. a yeh e Fall in h cou y o Summit and State of Ohio, have invented certain new'and useful Improvements in a Trimming Device, of which the following is a specification. I V

The invention relates specifically to improvements for increasing the effectiveness of well-known trimming devices, characterized by co-acting disk knives in combination with'a work pressing means, designed to trimirregularities, excess material and the like, from formed articles of manufacture, whereby the operation results in the reduction of the article .to' a pre-determined gage. The present disclosure, by way of illustraa i shows the i ventioj a appli th trimming of beads such as are used in the manufacture of pneumatic vehicle tires. I

An object of the invention is to provide means on the peripheries of certain of the rotating disk cutters, whereby the article passing through them, and pressed engagement therewith, will be positively drawn into the cutting edges without lost motion due to slippage. p

A further object is to provide an automatically operated pressure member, adaptedto intermittentlypress upon and release the article being trimmed, the period of,

oscillation being in synchronized relation with the trimming devices, whereby the pressure member willmaintain contact with the article throughout the trimming period.

Another object is to provide a work support comprising means for securing angular adjustment thereof, and work centering guides, whereby the operator is relieved of the ,duty of manually .flguiding the work through the cutters and of the incidental riskflbf injuryto his hands.

The inventionconsists further in the certain novel features ofconstruotion and com-' binations of parts, morefully set forth in the specifications and clalms and illustrated in the accompanying drawings.

In the drawings, which discloseoneem bodiment of the invention; similar numerals ot reference denote correspond ng parts.

Figure #1 1s a longitudinal elevation of the device. The left hand element, which is a counterpart .otthe right hand sidegis shown in section.

rollers.

Figure #5 is an enlarged view showing the co-acting disk cutters with a bead being trimmed thereby and retained by the pres, sure guide wheel. c i i i Referring in detail to the drawings, the invention is shown asapplied to a machine comprising, a base '1, and suitable supports- 2. J ournaled beneath the'base is a pqw r shaft 8, having on one enda pulley 4on which a belt is run from anydesired power source. N earthe.extremitiesof shaft Sal ie spur gears 5 keyed thereon and lmeshing w th spur gears 6, which will be hereafter described. Mounted on the bed 1 are apair of alined housings 7 and 8, within whichjareco r tamed the cutter disk spiiidles'l In view of the fact that the-mechanism related to these counterpart housings 7 and 8 is identical, except as otherwise noted, onlythos'e elef mentsdisclosel in housing '7 (Fig #1) will bedescribed. Provision is made by bolts 9 fitted in elongated slot's lO (Eigs'.#;1,and #2) for bodily, separating'the'lhousings in order to increase the gag'ebetween the cut.- tin edges of the disks. Y i i fiousings 7 ,and 8 are each bored to conta n a pairof bushings 11 and 12, the upper: bushing 11 beingnon-rotaltable .but aiiially slidable within the housing] and having.

gear for operating the pressure I tion 19, adapted to bear against'the face of bushing 12. The extreme end of spindle 14, projecting beyond the gear 6,'is provided with suitable locknuts 20,'which are used to accurately adjust the'spindle 14 within the bushing 12 in order that there shall be no longitudinal drift. This adjustment will bereadily appreciated by reference to spindle 13, projecting beyond the gear 23, is

provided with suitable locknuts 25fwhich are used to accurately adjust the spindle 13 within the bushing 11 in order that there shall beno longitudinal drift; (See Fig. #1.) Gear 23 being in mesh with gear 6, it is' apparent that the spindles, with their respective disk cutters','revolve together in opposite' direction.

In order. that the cutting edges of disks 16 and 22 may be nicely adjusted and kept in "contact, as wearing away and resharpeningfoccur to increase the clearances, the en tirespindle 13 is capable of longitudinal ad.- ustment toward and away from disk 16.

y referencefto Fig. #1, it will be noted that the'upper bushing .11 is axially slid able within its housing, the means being set screw 26 tapped into face plate 28'and hearing against the bushing, and draw bolt 27 tapped into 'bushing 11 and pulling against its head portion on the outer face of 28;

Manipulation of these members 26 and 27 effect the desired object, it being noted that the gear 23 can-drift transverse of the wider face portion of gear 6' to compensate for the linear .movement. I

The work 47 being fed through the disks is'jpressed upon the knurled portion 18 of disk 16 by means of apressureguide wheel 29 theoperationbeing as follows. On shaft 3 iskeyed a worm 30 driving a cam shaft 31 through a worm wheel 32. Shaft 31 issuit? ably ournal'ed in bearings 33 and at one extremity mounts a grooved cam disk wheel 34 in which is cut a cam groove 35. Within this groove is confined a follower 36 attached" to the end of a reciprocating arm 37, which 1 passes up through the base 1 and is confined within a bearing 38. The upper portionof 37 is counterbored to house a floating link piece 39, which is confinedtherein, but free to move longitudinally wlthin restrictions fixed by a pin 40 penetrating 39 and 'pro-' truding from each side of an elongated slot 41' in arm 37 The upper end of 37 is provided with a collar 42 against which a helical spring 43 reacts; the lower end ofqsaid spring resting against the pin 40. It will thus be noted that the spring tends to keep the end of link 39 pressed against the bottom of the counterbore in 37. Aifixed to 39 is a connecting link 44 fashioned at its upper end into aclevis which is pinned to the oscil-. lating arm 45. One end of arm 45 is fulcrumed at 46 to an upstanding bracket 58, the other end is formed as a clevis, or yoke, supporting thereon the free-runmng pressure'guide wheel'29. (See igl #2.) b On the up stroke of the cam gear the wheel 29 will berai'sed frointhe work 47 by operation of the gearing mentioned, the lift being apositive operation due to the end of39 bearing upon the bottom of the counterboreof 37 On the downstroke of the. cam gear. the wheel 29 will follow by gravity the recession of link '44 untilit's periphery cont-acts with the work47, at which point further movement of the v vl1eel' is,l of course, arrested; After the wheel 29 has contacted with 47: the "camfollower still seeks a lower position in the revolving cam groove 35, thus resulting in the compression of the sprin'g243 asarm37 continues to recede while link 39, with its directconne'cted members, .is arrested. The wheel 29 thereby resiliently presses uponjthe work, causing it to adhere to the knurled surface 18' of disk 16 during th e trimming operation. v n a j 5' j I Y The work support table 48 is pivoted on suitable hinges 49 located on ,housing 8 in' a. convenient manner adjacent the contacting edges of a pair of cutter disks, Angular adjustment of the tableto correspond with the contacting 'faceo'f the work47, as it lies normally" upon the disksi16, is effected by a telescopic brace .50, pivot-ally attached to the base 1 and table '48 and locked iniany desired extension by means of :a suitable clamp 51. Suitable guide "rollers .52 are journaled on pins in the free end of swingi ing arms 53 whichextend'upwardly. within quadrant slots" 54 in the table 48. 53 are capable ofbeing locked in any de-. sired position by means oflsuitablewingnuts 55. In order thatthe guide rollsmaybe set to correspondwith diiferentdiameters of the work, when in" annular form,- indicator he arms points 56 are providedon the free end of i arm 53 and in the table 48 are set-graduated scales 57 suitably laid off to the desiredset tings. .1

Having set forth the construction inhsuch detail the operationof the device, as awhole,

v will be'briefiy described.

, It will be noted that this device iscapable of continuous operation without requiring that the operator give his attention to duties other than the placing of a bead upon the table 48 and the removal of it therefrom upon the completion of its single passage in motion. As the pressure guide wheel raises automatically a bead is dropped upon the table in proper relation with the guide rollers and is caught within the cutting edges of the disks. The pressure guide wheel now drops rapidly and confines the work within its shaped periphery, which corresponds with the portion of the work contacted thereby. The wheel 29 is resiliently pressed upon the work, as explained, in a manner adapted to insure non-slippage of the work with respect of the knurled peripheries of the lower disks 16. The cam gear is so designed that the period of contact of 29 with the work extends throughout one revolution of the work through the cutters, though any desired time may be set. At an appropriate time the wheel raises rapidly, thus automatically notifying the operator that removal of the bead is in order. The cam gear is so arranged that the interval of release, that is, the time for removing a trimmed bead and replacing a rough one, is reduced to the mmlmum.

As time is of the essence of commercial success of such a device as this, it will be appreciated that this invention has made the trimming operation rapid and automatic, and that an operator has onlyto feed the machine, which is rated at a speed corresponding to his dexterity.

In the preferred form of this device a tilting table has been shown on which the work is laid. The relative angular adjustment of this table with respect of the normal faces of the disks on which the work is pressed, may be secured by tilting the machine with respect of the table by means of appropriate adjustment and the same result accomplished.

Having thus described my invention, I claim 1. A device of the character described comprising in combination, coacting disk cutters arranged inseparated pairs, friction'increasing means on one disk of each pair adapted to engage and draw the work through the disks; and an automatically op erated work pressure member adapted to in termittently press upon and release the work periodically in relation to the progress of the linear flow of the work through the cutters.

2. A device of the character described comprising in combination, coacting disk cutters in spaced apart pairs, means associated with one cutter of each pair for regulating the contact thereof with its coacting member, means for moving the spaced apart pairs toward and away from each other, a knurledperipheral portion on one disk of each palr; an automatically operated work pressure member in synchronized relation with the disks, having means associated therewith for resiliently pressing said member upon and releasing it from the work.

3. A device of the character described comprising in combination, coacting disk cutters; a work pressure member in synchronized relation with the disk drive mechanism and adapted to intermittently press upon and release the work; and an inclined feed table having work centering means thereon.

4. A device of the character described comprising in combination, coacting disk cutters; a work pressure member in synchronized relation with the disk drive mecha nism and adapted to intermittently exert resilient pressure upon and release the work; and an angularly adjustable feed table having adjustable work centering means thereon.

5. A device of the character described com prising in combination, coacting cutter disks, arranged in pairs, one disk of each pair having a cutting edge and a friction increasing periphery; an automatically operated work pressure wheel adapted to intermittently grasp and resiliently press and release the work in synchronized relation with the cutter disk driving mechanism;

6. Adevice of the character described comprising in combination, coacting cutter disks, arranged in pairs, one disk of each pair having a cutting edge and an elevated peripheral friction increasing part; an automatically operated work pressure wheel adapted to intermittently grasp and resiliently press and release the work in synchronized relation with the cutter disk driving mechanism; and a work holding table having means associated therewith for securing relative angular adjustment between the face of the table and the normal work holding faces 01": the work support and cutting disks.

7. A trimming device comprising, coacting rotary disk cutters arranged in pairs, having friction increasing means on one disk of each pair adapted to draw the work there through, an automatically operated work pressure means adapted to intermittently press'upon and release the work peri odically in relation to the progress of the work through the disks, and a work sup port adapted to position and relate the stock to the disk cutters.

In testimony whereof I aflix my signature.

ROBERT McCLENATI-IEN. 

